DE1815173B1 - Schaltungsanordnung fuer Fernsprechmikrofonverstaerker - Google Patents

Schaltungsanordnung fuer Fernsprechmikrofonverstaerker

Info

Publication number
DE1815173B1
DE1815173B1 DE19681815173 DE1815173A DE1815173B1 DE 1815173 B1 DE1815173 B1 DE 1815173B1 DE 19681815173 DE19681815173 DE 19681815173 DE 1815173 A DE1815173 A DE 1815173A DE 1815173 B1 DE1815173 B1 DE 1815173B1
Authority
DE
Germany
Prior art keywords
amplifier
circuit arrangement
blocked
emitter
transistors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19681815173
Other languages
German (de)
English (en)
Inventor
Beil Dipl-Ing Franz
Christian-Helmut Katz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Corp
Original Assignee
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Priority to DE19681815173 priority Critical patent/DE1815173B1/de
Priority to DE19681815174 priority patent/DE1815174C/de
Priority claimed from DE19681815174 external-priority patent/DE1815174C/de
Priority to NL6918399A priority patent/NL145738B/xx
Priority to JP9856269A priority patent/JPS5113962B1/ja
Priority to CH1851669A priority patent/CH512862A/de
Priority to AT1164169A priority patent/AT296403B/de
Priority to BG013549A priority patent/BG20634A3/xx
Priority to LU60014D priority patent/LU60014A1/xx
Priority to FR6943549A priority patent/FR2026348A1/fr
Priority to GB6115969A priority patent/GB1244548A/en
Priority to SE1736569A priority patent/SE346190B/xx
Priority to BE743283D priority patent/BE743283A/xx
Publication of DE1815173B1 publication Critical patent/DE1815173B1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H03F3/347—DC amplifiers in which all stages are DC-coupled with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
DE19681815173 1968-12-17 1968-12-17 Schaltungsanordnung fuer Fernsprechmikrofonverstaerker Withdrawn DE1815173B1 (de)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE19681815173 DE1815173B1 (de) 1968-12-17 1968-12-17 Schaltungsanordnung fuer Fernsprechmikrofonverstaerker
DE19681815174 DE1815174C (de) 1968-12-17 Fernsprechmikrofonverstarker mit ver starkerausgangsseitiger Speisung
NL6918399A NL145738B (nl) 1968-12-17 1969-12-08 Schakeling voor een microfoonversterker.
JP9856269A JPS5113962B1 (OSRAM) 1968-12-17 1969-12-08
CH1851669A CH512862A (de) 1968-12-17 1969-12-11 Schaltungsanordnung für Fernsprechmikrofonverstärker
LU60014D LU60014A1 (OSRAM) 1968-12-17 1969-12-15
BG013549A BG20634A3 (bg) 1968-12-17 1969-12-15 Усилвател за микрофон
AT1164169A AT296403B (de) 1968-12-17 1969-12-15 Schaltungsanordnung für transistorisierte Fernsprechmikrophonverstärker
FR6943549A FR2026348A1 (OSRAM) 1968-12-17 1969-12-16
GB6115969A GB1244548A (en) 1968-12-17 1969-12-16 Improvements in or relating to microphone amplifiers
SE1736569A SE346190B (OSRAM) 1968-12-17 1969-12-16
BE743283D BE743283A (OSRAM) 1968-12-17 1969-12-17

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19681815173 DE1815173B1 (de) 1968-12-17 1968-12-17 Schaltungsanordnung fuer Fernsprechmikrofonverstaerker
DE19681815174 DE1815174C (de) 1968-12-17 Fernsprechmikrofonverstarker mit ver starkerausgangsseitiger Speisung

Publications (1)

Publication Number Publication Date
DE1815173B1 true DE1815173B1 (de) 1970-08-20

Family

ID=25756604

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681815173 Withdrawn DE1815173B1 (de) 1968-12-17 1968-12-17 Schaltungsanordnung fuer Fernsprechmikrofonverstaerker

Country Status (11)

Country Link
JP (1) JPS5113962B1 (OSRAM)
AT (1) AT296403B (OSRAM)
BE (1) BE743283A (OSRAM)
BG (1) BG20634A3 (OSRAM)
CH (1) CH512862A (OSRAM)
DE (1) DE1815173B1 (OSRAM)
FR (1) FR2026348A1 (OSRAM)
GB (1) GB1244548A (OSRAM)
LU (1) LU60014A1 (OSRAM)
NL (1) NL145738B (OSRAM)
SE (1) SE346190B (OSRAM)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8004675A (nl) * 1980-08-19 1982-03-16 Philips Nv Signaalbufferschakeling in een geintegreerde schakeling voor het leveren van een uitgangssignaal aan een aansluitklem.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
LU60014A1 (OSRAM) 1970-02-16
SE346190B (OSRAM) 1972-06-26
CH512862A (de) 1971-09-15
NL145738B (nl) 1975-04-15
JPS5113962B1 (OSRAM) 1976-05-06
DE1815174B2 (OSRAM) 1970-10-29
GB1244548A (en) 1971-09-02
BG20634A3 (bg) 1975-12-05
BE743283A (OSRAM) 1970-06-17
AT296403B (de) 1972-02-10
FR2026348A1 (OSRAM) 1970-09-18
NL6918399A (OSRAM) 1970-06-19
DE1815174A1 (de) 1970-06-18

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee